Pneumatic tire.



Mh S. MUMMEBY.- Y PNEUmAnc Tang. vAPPLnnmom mi'b'wnf la. |913.

Patented Aug. 31, 1915;

1bn/amm annemarie .Specication of Lettersatent.

Application tiled .lune 18, i813. Serial No. 774.272.

enable others skilled in the art to which it pertains to make and use the same, reference .being had to the accompanying drawings, Which form a. part oi" this specification.

My invention relates to 'pneumatic tires and consists in means for preventingin the f use thereoil of Vpuncmres ot the pneumatic tubes in which it is common to create an; air pressure sutlicient to keep the tire distended in use.

ln the drawings-Figure l is a section of the tire constructed according to. 'K `ar- .rangement and showing the various compr` L nent parts thereof. Fig. 2 is a detail plan view of the armored layers Which areiiiserted under the tread of the tire for the purpose 'of' preventing punctures as stated, Fig. 3 1s a detail view showing the manner of holdingthe armor plates. Fig. 4- is ade.

tail sectional @view on line X-X, Fig. 3, ot

-the manner of fastening plates' to the fiber strips which carry them.

ln the drawings .similar letters refer tou similar' parts.

l have shown 1n Fig. l a common clencher. tire, although 1t is obviousthat niyinven-l tion is applicable to any form of pneumatic l tire of the ordinary two-piece. type, to-Wit,- an inner tube to retain the airand an outer casing which carries the tread.

ln the drawings, A is the inner elastic tube, B isthe liber element which is usually termed the carcass and upon which the burst ing` strength of the tire depends.

C isthe usual layer of soit rubber termed the cushion and is vulcanized to the fiber layer B. I

D is the special construction of a breaker; strip, so-called, in which my invention resides and which is more fully described hereinafter.

E is the tread consisting1 usuallyrl hardened'but elastic rubber adapted to receive the Wea-r ofthe road.

lin Fig. 2 are shown the details of the armored breaker' strip i3. rl`his consists in my invention oi several layers or thicknesses of strong Woven liber or iabric a, e, c, d, c,

and` may be of any number thereof as desired oi' the manufacture. l have shown five .0f such layers. 'Layer a, which is next to ythe cushion C, carries upon its outer surface, as compared 1ariththe inner part of the tire, a series of metal disks i7, l? Although l do not limit myself to the exact shape oi? this disk, vwhich might be oval or even consist of parallelograms of any other proper shape, it 1 is preferable that the edges be not angled. ylilhese` disks are fairly closely arranged, as shown in-lFig. 2,011 strip a.- and -are attached to said strip by ears or lips f, which pass through the stripanc are clenched down, as shown at f, in Fig. 3, the latter ligure being .the under sidevievv of the disk and strip a.. .,At f have shown one-oi' those lips Without being clenched as illustrated in Fig'. 4;. Ar"- ter this strip is constructed ano/her breaker strip b is cemented to and covers the metal idisks f,"f. Upon I) is cemented a similar "layer of ibrousmaterial c ivh'ich'also carot' a, butarranged seas to cover the vacant places left in the arrangement of the disk upon a` sothat thedisk on c Will, as shown in Figt, break joints With those of a. @ver this layer c there iscemented a covering of fibrous material (l, Aand a similar strip e may be cemented upon ,-e also carrying in the same manner as l have described in vregard to a.. The description in regard to a answers for a description of all the layers carrying the disks. lt is obvious that as many of these layers may be arranged as is desired. ln the illustration l have shown three iibrous layers carrying armored disks le, F With tivo intermediate fibrous layers 5 Z), (Z which do not carry disks. y

yries disks in exactly the same manner as that similar disks F, F attached thereto exactly fin important feature of my invention is that the armored strip i) is broken] up or made up or" layers of brous material alternately arranged with the interposed layers oi' non-brous material. The armored plates on the layers respectively are.l intended to cover and break joints with the openings that are leit by the under armored layer in the arrangements of the disks thereon, so

that the total arrangement and mmbinationv affords a perfect armored but ieXi-ble shield to the underlying carcass of the tire and the inner meumatic tube Which sealsthe coinpresse air.

`While l have shown the armor only en circling vsubstantially the tread of the tire,

it is Olivius; hat this r mepmy be' @tflayers inthe cushion "'ptCend per thetire .is Worn downfto the strip carrying vthese' plate Alehi'iiiageclJf12h43` damaged' strip may' he epa- "i @rarityme fingl ection'sy'wnserted or 'cementedf'downin' "p reperetory to, vnloanizinge treed'fE.-

ans wellknownjto tire lijepfallire/rs,A

v the underlying strips.y end new ones,

,Hitting thusfdescribed 'my he@ the tread E,Vbut such constructionfdoes'not anchor the. disks, nor'- are-they" sogpleced' that' they may' be readily-removed from'fthel tirefandgrepairs triade;...end furtherg' when l effebiiocer eesshaving :i covering 1on lts tread ofsoft seid covering being thickened et the fpe'1iphe1'y and tapering tothe edges thereof,

Awhich edges terminate f vshort fof the beads of the bewees, 'as fabric stri-pheving "e mul-,f

nged edgeto edgeonfthe front 915, and having retning nie/ans penetr'ting '.-fthe;f2bric i and' engaginggthe rear slixffeee, thereof so' s to Contact with `seid soft? rub# 'ber covering', whereby the meteilic members are liedly secured in place, e second vfabric' strp'leemented directly to the metallic nuern- -ainor strip'connected to the secondi-strip,i a

i `f'ao'vering strip Connected to. said 'like-armor e of'eny of the emn'oredetripshecenies n strip, end4 a, "yielding tread portion -on the ontw-.surface of the tire overlying 'the last tilde' 'of disk-shaped metaliicffniembersf er-j bers and tothe first mentioned strpy'feliikei. .4Q

'vinentioned' coveringstrip, .the edges of which 4yieldingl treed, vportion teminate short .of @the sideedgesv of the soft rubber coveringi 

